As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

 6/27/17‡ GATX Corp.                        11-K       12/31/16    2:243K                                                            
 6/27/17‡ GATX Corp.                        11-K       12/31/16    2:241K                                                            
 2/22/17  GATX Corp.                        10-K       12/31/16  156:27M                                                             
 1/27/17  Golden Deborah A                  5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/26/17  Kenney Brian A                    5          Dir.,Off.²  1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/26/17  Adedoyin Niyi                     5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/26/17  Muckian William M                 5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/26/17  Young Jeffery R.                  5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/25/17  Lyons Robert C                    5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/24/17  Ellman Thomas A.                  5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/24/17  Earl James F                      5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/24/17  Harkness Eric D.                  5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/24/17  Conniff James M.                  5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/23/17  Brooks Michael T.                 5          Officer²    1:4K   GATX Corp.                        Morse Elizabeth Myers    
 1/23/17  Titterton Paul F                  5          Officer²    1:5K   GATX Corp.                        Morse Elizabeth Myers    

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‡	A non-Insider-Ownership Filing that was accepted after the SEC “closed” at 5:30:00pm ET.  The legal “Filed As Of” date may be the next, or another, day.
¹	Filing/Form Types:  -A
	5	Annual Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 5 { The Filer is an Insider² of the Issuer }.
	10-K	Annual Report — Form 10-K.
	11-K	Annual Report by an Employee Stock Purchase, Savings or Similar Plan — Form 11-K.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.